Biology Review

Homeostasis

Internal stability in an organism, such as body temperature and blood pressure.

Science Inquiry

A planned investigation of the natural world to gain knowledge.

Hypothesis

A testable explanation for a specific situation or phenomenon.

Pseudoscience

Areas of study that mimic science but lack scientific support, such as astrology.

Atoms

The basic units of matter made of protons, neutrons, and electrons.

Protons

Positively charged particles found in the nucleus of an atom.

Neutrons

Neutral particles found in the nucleus of an atom.

Electrons

Negatively charged particles that orbit the nucleus of an atom.

Elements

Pure substances that cannot be broken down into simpler substances.

Periods

Horizontal rows in the periodic table of elements.

Groups

Vertical columns in the periodic table of elements.

Isotopes

Variants of the same element with different numbers of neutrons, identified by the sum of protons and neutrons.

Radioactive

A property of certain isotopes that decay and emit radiation.

Compounds

Substances formed from two or more elements chemically bonded together, such as water (H2O).

Chemical Bonds

Forces that hold substances together, involving the interaction of electrons.

Molecules

Compounds where atoms are held together by covalent bonds.

Covalent Bonds

Chemical bonds formed when atoms share two or more electrons.

Ionic Bonds

Chemical bonds formed when atoms transfer one or more electrons to each other.